This paper presents a new approach to model heat transfer through an optical fibre. Three thermal strain modelling procedures were evaluated for coated and uncoated FBG optical fibres, considering different layers of sensors that effect strain measurements. The compensation factors required for strain measurements were investigated. The acrylate coating was found unsuitable for thermosetting polymers due to low Tg whereas, polyimide coating was appropriate for cure monitoring due to high Tg than most thermoset resins. Three types of thermal strain models were simulated, and the results were compared with experiments. The heat transfer through the core of an optical fibre was found negligible relative to glass cladding and the coating layers. It was found that thermal strains induced by the glass cladding and protective layers become more dominant as the heating rate and temperature range increases. The uncoated FBGs were found to give better accuracy for high temperature applications.

本文提出了一种模拟通过光纤传热的新方法。考虑到影响应变测量的传感器的不同层，对涂覆和未涂覆的FBG光纤的三种热应变建模程序进行了评估。研究了应变测量所需的补偿因子。的丙烯酸酯涂层被发现不适合于热固性由于低的聚合物的Tg而，聚酰亚胺涂层是适当的固化，由于高监测Tg的比大多数热固性树脂要好。模拟了三种类型的热应变模型，并将结果与​​实验进行了比较。发现通过光纤芯的热传递相对于玻璃包层和涂层是微不足道的。发现随着加热速率和温度范围的增加，由玻璃包层和保护层引起的热应变变得更加明显。发现未涂层的FBG可为高温应用提供更好的精度。